| 1. | a gross, stupid, or careless mistake: That's your second blunder this morning. |
| 2. | to move or act blindly, stupidly, or without direction or steady guidance: Without my glasses I blundered into the wrong room. |
| 3. | to make a gross or stupid mistake, esp. through carelessness or mental confusion: Just pray that he doesn't blunder again and get the names wrong. |
| 4. | to bungle; botch: Several of the accounts were blundered by that new assistant. |
| 5. | to utter thoughtlessly; blurt out: He blundered his surprise at their winning the award. |
